Drilling Services
Key specifications of our jackup rigs: To Drilling Services

This jack-up drilling rig is the latest addition to our growing fleet of offshore drilling rigs. The Nan Hai ¢ô is designed to provide first class drilling services in all weather environments. It holds ABS &classification and is fully IMO compliance and certified. COSL has a proven track record in offshore drilling operations and assures its customers that our rigs will be operated according to stringent international and industry standards particularly in regards to Quality and HSE.

NANHAI ¢ô
Design Criteria
Max/Min Operating Water Depth: 315/33 ft
Max Rated Drilling Depth: 20,000 ft
Storage Capacities
Fuel Oil: 861.1 m3
Drilling Water: 915.1 m3
Potable Water: 513.1 m3
Bulk Mud: 164m3
Bulk Cement: 164m3
Heavy Mud Accepted: 2m3
Sack Storage:  
Main Dimensions
Length Overall£º 213'3"(65.0M)
Breadth Overall: 212¡¯ (64.62M)
Depth of Hull: 25'11"(7.9M)
Overall Length of Leg: 435 ft including Spud Cans
Number of Legs: 3
Type of Legs: Independent/Triangular
Heli-Deck Diameter: 22.7M¡Á22.7M
Max. Cantilever Combined Load: 1000 kips at 60ft/0ft
660kips at 60ft/12ft
Living quarters: 116 persons per UK HSE
Maximum Gross Variable Load
Transit VL: 5,900kips (2675mt)
Drilling VL: 5,551kips (5217mt)
Survival VL: 3,067kips (1391mt)
Jacking VL: 4,745kips (2152mt)
Power Equipment
Main Diesel: Electro-Motive Division, USA(EMD)
Diesel Engines: 2875 PS x 2, 900 rpm
2150 PS x1, 900 rpm
Main Generators: 3500KVAx3, 60Hz, 0.6pf
2625KVAx1, 60Hz, 0.8pf
DC Drilling System: 10EA, 600KW, GE
Drilling Equipment
Draw works: National 1320-UE
Derrick: National oilwell
Traveling Block: National oilwell 760TB650st
Crown Block: National oilwell 760A
Top Driver: Varco/BJ TDS-3SE23X04
Rotary Table: National C-375
BOP Equipment
BOP Stack: One Set Hydril 13-5/8"5K
One Set Hydril 21-1/4¡± 2K BOP Stack
One Cameron "U" 10,000psi 13-5/8" double ram
One Cameron "U" 10,000psi 13-5/8" single ram
BOP Control System: Koomey type 45160-3S
Accommodation
Company Representative¡¯s Office: 2
Contractor¡¯s Representative¡¯s Office: 1
Control Room: 1
Radio Room: 1
Helicopter Assembly Room: 1
Hospital / No of Beds 1/2
Accommodations:  
Number of double rooms:
33
Number of four rooms:
12
Toilets: 64
Showers: 64
Galley: 1
Recreation Room: 2
Gym: 1
Changing Room: 2
Deck Crane
Crane: Two National Oilwell 60DNS100-1,75
One National Oilwell 60DNS110-1,75
Location: Port/Stb fwd/Stb Aft.
Boom Length: 100ft for both eng.; 110ft for elec.
Block capacities and hoisting speeds:  
Load/Radius/Speed(min.radius): 46mt /19.9ft /1.1 t/ft (ft/sec) for eng.
46mt /21.3ft/1.1 t/ft (ft/sec) for ele.
Load/Radius/Speed(max.radius): 12mt/114ft/3 t/ft (ft/sec) for eng.
12mt/124ft/3 t/ft (ft/sec) for ele.
Jacking Systems and Rack chock system
Make/type: NOI-Nantes France/ BLM C150E
No. of jacks or pinions: 48 units
Maximum normal jacking capacity: 410 kips/units
Maximum preload jacking capacity: 730 kips/units
Jacking speed: 1ft/min
Rack chocks available: Yes
 
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